refactor: Improve error handling and remove unused code #172

Job	Run time
build-ui	1m 1s
build-docreader	6m 25s
build-app (arm64, linux/arm64, ubuntu-24.04-arm)	5m 44s
build-app (amd64, linux/amd64, ubuntu-latest)	5m 28s
merge	16s
	18m 54s

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